Sydney Arpt climate by month
Averages and records for each calendar month at Sydney Arpt, Canada, from 1941 to 2026. The warmest month is July, averaging 23.3°C; the coolest is February at −1.5°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −0.9°C | −9.0°C | 16.9°C16 January 1995 | −26.2°C26 January 1994 | 75 / 75 |
| February | −1.5°C | −10.0°C | 18.0°C28 February 2000 | −27.3°C8 February 1994 | 74 / 75 |
| March | 1.5°C | −6.3°C | 23.1°C22 March 2012 | −25.6°C2 March 2001 | 74 / 75 |
| April | 6.3°C | −1.8°C | 27.2°C25 April 1942 | −14.6°C5 April 1995 | 76 / 76 |
| May | 12.9°C | 2.7°C | 31.1°C31 May 1960 | −7.8°C2 May 1972 | 76 / 76 |
| June | 18.6°C | 7.6°C | 34.4°C29 June 1944 | −3.9°C9 June 1956 | 76 / 76 |
| July | 23.3°C | 12.6°C | 33.9°C19 July 1975 | 2.2°C15 July 1961 | 76 / 76 |
| August | 22.8°C | 13.0°C | 35.5°C10 August 2001 | 2.8°C31 August 1965 | 75 / 76 |
| September | 18.7°C | 9.1°C | 32.3°C10 September 2001 | −1.7°C29 September 1971 | 73 / 75 |
| October | 12.8°C | 4.4°C | 27.2°C7 October 2025 | −5.6°C31 October 1944 | 74 / 74 |
| November | 7.4°C | 0.4°C | 22.2°C5 November 1961 | −12.0°C19 November 1999 | 74 / 74 |
| December | 1.9°C | −5.1°C | 16.7°C6 December 1951 | −22.2°C29 December 1993 | 74 / 74 |
Years shows the number behind the average high, then the number holding a record for that month. They differ because a year contributes an average only when the month has at least 25 days of readings, while a single reading is enough to set a record. The average low is withheld on the same 25-day rule and is counted separately again; it is shown as a dash where the archive cannot support it. Across the twelve months here the averages rest on 73 to 76 years each.
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Every figure on this page is computed from NOAA GHCN-Daily observations stored per station, per year, per month. Nothing is modelled, interpolated or estimated, and a month the archive never covered is left out rather than filled in. A station appears here only once all twelve months carry an average from at least 10 years. See how this is built.